Measurement

The measurement is usually conducted through using a three-electrode setup:

1.      Working electrode

2.      Counter electrode

3.      Reference electrode (standard hydrogen electrode or an equivalent)

In case of non-zero net current on the electrode, it is necessary to minimize the ohmic IR-drop in the electrolyte, example, through positioning the reference electrode near the surface of the working electrode (example., see Luggin capillary), or using a supporting electrolyte of adequately high conductivity. The potential measurements are carried out with the positive terminal of the electrometer connected to negative terminal and the working electrode to the reference electrode.